their markets. >> susie: that's u.s. trade rep ron kirk. he joins us for an exclusive interview about our trade issues with china. you're watching "nightly business report" for thursday, september 23. this is "nightly business report" with susie gharib and tom hudson. "nightly business report" is made possible by: this program is made possible by contributions to your pbs station from viewers like you. thank you. captioning sponsored by wpbt >> tom: good evening and thanks for joining us. president obama today met with china's premier in new york city, and, susie the leaders of the world's two biggest economies pledged to work together on boosting the global recovery. >> susie: but tom, in their public remarks, the men didn't talk about china's undervalued currency. instead, that's said to have topped the agenda for their private meeting. the issue-- keeping china's currency artificially low puts american exports at a disadvantage overseas. >> tom: lawmakers in washington, meantime, are closer than ever to acting on threats to penalize china over its currency. earlier today, i caught up with u.